Reversing mechanism for fluid-engines



F. A. JIMERSON.

REVERSING MECHANISM FOR FLUID ENGINES.

APPLICATION FILED JULYI1.1917.

1,338,732. Patented May4,1920.

2 SHEETS-SHEET I.

F. A.1|MERS0N. REVERSING MECHANISM FOR FLUID ENGINES.

APPLICATION FILED IULYII, 1917.

Patented May 4, 1920.

2 SHEETS-SHEET 2.

l/VVENT? A ORNEY UNITED STATES PATENT OFFICE.

FRANCIS A. J'IMERSON, OF ATHENS, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAND COMPANY, 0F JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

REVEBSING MECHANISM FOR FLUID-ENGJINES.

To all whom t may concern:

Be it known that I, FRANCIS A. JIMERsoN, a citizen of the United States, residing at Athens, in the county of Bradford and State of Pennsylvania, have invented a certain new and useful Improvement in Reversing Mechanism for Fluid-Engines, of which the following isa specification.

This invention relates to fluid engines and in particular to engines designed to operate rotary tools, such as drills and the like. V

The invention relates more especially to a construction of throttle and reversing valve mechanism for operating the engine in either direction.

The objects of my-invention are to providean improved device to admit fluid to the engine tov permit a ready reversal of the engineby means of. a simple movement of one of the parts 'of the engine and to provide means-for automatically closing the throttle valve and stopping the operation of the tool when pressure on the operating parts is removed.

With these and other objects in view, my invention consists in the features ofl construction and operation set forth in the following specication.

In the drawings annexed hereto and forming a part hereof,

Figure 1 shows an elevation of the complete tool, parts being shown in section;

Fig. 2, a top plan view of a part of the tool, parts being shown in section;

Fig. 3, an enlarged view of the reversing valve forming a part of 4mv .invention taken on the line 33iof Fig. 2; l n

Fig. 4, a cross sectional view taken on the line 4.-4 of Fig. 3; and

Fig. 5, a section on the line.5"-5 of Fig. 1.

Referring more particularly to the drawings, 1 refers to the casing of the tool provided with my invention, the tool selected for illustration. being a rotary drill of well known type. to the fluid admission and distribution, the cylinders and pistons of the engine have not been illustrated. The lcasing at one side is provided with a short. hub or boss 2 to which the handle 3 is attached, in which is located the fluid admitting means.

Preferably, the handle comprises a stem 4 set into a hole 5 provided in the hub or toss e and is retained place ther-ein by Specification of Letters Patent.

. plied to the tool.

As this invention relates only Patented May 4, 1920.

Application mea July 11, 1917. serial No. 179,373.

means of a yoke piece 6 fastened to the hub 2 by means of screws or studsf? and engaging a flange 8. provided on the stem 4. The stem is provided vwith a hole 9 extending centrally throughout its length, which actsas a conduit for the motive fluid sup- Attached tothe stem 4 at its outer eXtremity is the handle body 10 containing the valve seat 11 for the throttle valve 12 and ,to 4the stem 4. YSurrounding the stem 4 and handle body 10 is a sleeve l14 loosely mounted so that it may easily be rotated. To retain this sleeve 14 in( place and also to provide a connection forthe fluid supply, a cap 15 is provided which is preferably screwed into the handle body 10 and provided with a flangevlf` engaging over the end'of the sleeve 14. A

The sleeve14 is provided ywith cam grooves 17, preferably of V-shape and diametrically disposed vabout the sleeve, 14. Placed within these4 cam grooves vand extending through an elongated hole 18 provided in the handle body 10'is a pin 19 engaging the end of the throttle valve` stem 20. It will be` seen from this construction that when the sleeve 14 is rotated aboutthe stem 4 and handle body 10, the pin v19 moves forwardly and rearwardly in hole 18 vdue to the form of the cam slots 17 provided in the sleeve 14. As this pin rests against the throttle valve stem 20, movements of the pin will be communi cated to the throttle valve 12, thus opening and closing it. -Resting against the head of the throttle valve 12 and engaging the cap 15 is a helical spring 21 which will close the valve 12 when pressure on the sleeve 14 is removed and the sleeve is allowed to return to its central position with the pin 19 located midway of the cam slots 17. Y

provided with two spaced heads 24 and 25 separated by a reduced or neck portion 26. At one end of the valve 23 is an extension 27 through which extends a screw 28 to whose point engages a second cam slot 29 y provided for it in sleeve 14. This is shown clearly in Fig. '2. Extending from the circumferential surface of the head 24 to'thc extremity of the valve 23 is a passage 30, and surrounding lthe valve 23 is a bushing 32 provided with ports for the admission and exhaust of fluid from the chamber in which the valve 23 operates to the piston operating valves (not shown). IVith the valve in the position as shown in Fig. 3, fluid will be admitted through conduit 9 to the port 33 into. the valve chamber in which valve 23 operates, from which it may pass past the reduced portion 26 of the valve 23 to the port 34 and then to the distributing valves and through the engine cylinders, (not shown), and return-through conduit 35 to the exhaust conduit 36. With the valve .23 in its other extreme position, as shown in Fig. 1, fluid will be admitted through port 33 to port 35 and then through the engine and will then exhaust through port 34 into the passages 30 extending through the valve 23 and then out through the exhaust conduit 36. It will thus be seen that in this latter position of the valve the fluid passes through the distributing valves and through the engine in the opposite direction from that in which it would when the valve was in the position as shown in Fig. 3. This will have the effect of rotating the engine in the opposite direction, as will be clearly understood by those familiar with these engines.

To Jfacilitate the movements of the valve 23 to reverse the engine, the cam slot 29 is located relatively to the cam slots 17 so that when the throttle valve 12 is closed and the pin 19 located midway of the cam slots 17 the reversing valve 23 will be in its central or neutral position. This is the position of the parts in Fig. 2. When it is desired to operate the engine in one direction the sleeve 14 is rotated slightly which will open the throttle valve 12 as above described and will also operate the reversingivalve 23 to open communication of the port 33 with either the port 34 or 35, and when it is desired to operate the engine in the opposite direction the sleeve 14 is rotated in the opposite direction, when the communication of port 33 with 34 or 35 will be reversed. Preferably, a slight amount of play is allowed the pin 19 beforeit takes up on the stem 20, so that the reversing valve 23 will be moved slightly to open the ports to admit fluid. to the engine before the throttle valve 12 opens. From this it will be evident that the reversing valve 23 movessimultaneo'usly with the throttle valve 12 and that the movement of but one part, namely, 14, controls the movement of both of these valves. When pressure is removed from the rotating sleeve 14 the reversing valve 23 is returned to its central or neutral position and at the saine time the throttle valve 12 is returned to its closed position.

It is to be understood that the present showing and description disclose only one specific embodiment of my invention and that other forms and modifications are included within the spirit and scope thereof, as expressed in the appended claims.

lhat I claim is:

1. In a reversing mechanism for fluid engines, in combination, a throttle valve, a reversing valve and a rotating sleeve, means connecting said rotating sleeve to said throttle valve and reversing valve whereby rotation of said sleeve opens and closes said throttle valve and varies the position of said reversing valve. 2. In a reversing mechanism for fluid engines, in combination, a reciprocatory reversing valve, a rotating sleeve.- and pin and slot -means connecting said rotating sleeve to said reversing valve whereby rotation of said sleeve positions the reversing valve to operate the fluid engine in either direction and simultaneously opens the throttle valve.

3. In a reversing mechanism for fluid engines, in combination, a reversing valve, va rotating sleeve, said sleeve being provided with a cam slot, and means attachedl to said reversing valve engaging said cam slot whereby rotation of said sleeve varies the position of said reversing valve.

4. In a reversing mechanism for fluid engines, in combination, a reciprocatory reversing valve, a rotating sleeve, said sleeve being provided with a cam slot and means attached to said reversing valve engaging said cam slot whereby rotation of said sleeve varies the position of' said reversing valve.

5. In a reversing mechanism for fluid engines, in combination, a throttle valve, a reversing valve and a rotating sleeve, said rotating sleeve being provided with cam slots, means attached to said throttle valve and reversing valve engaging said cam slots, whereby rotation of said sleeve simultaneously operates said throttle valve and reversing valve.

6. In a reversing mechanism for fluid engines, in combination, a throttle valve, a reversing valve independent thereof, means to versing valve independent thereof, a rotating sleeve provided with cam slots, means attached to said valves engaging said cam slots whereby rotation of said sleeve simultaneously operates both oi' said valves and means to automatically close said throttle valve and return said reversing valve to its neutral position when pressure on said rotating sleeve is removed.

8. In a reversing mechanism for luid engines, in combination, a throttle valve, a reversing valve independent thereof, a rotating sleeve provided with cam slots,'means attached to said valves engaging said cam slots whereby rotation of said sleeve simultaneously operates both of said valves, and means engaging one of said valves to automatically close said throttle valve and return said reversing valve to its neutral position when pressure on said rotation sleeve is removed.

9. In a reversing mechanism for fluid engines, in combination, a throttle valve, a reversing valve operated simultaneously therewith, and means to automatically close said throttle valve and return said reversing valve to neutral position.

10. In a reversing mechanism for Huid engines, in combination, a throttle valve, a reversing valve and a rotating sleeve, means connecting said rotating sleeve to said throttle valve and reversing valve whereby rotation of said sleeve opens and closes said throttle valve and varies the position of said reversing valve and means engaging the throttle valve to close it when pressure on the rotating sleeve is released.

ll. In a reversing mechanism for fluid engines, in combination, a reciprocatory re versing valve, a rotating sleeve and means connecting said rotating sleeve to said reversing valve whereby rotation of said sleeve positions the reversing valve to operate the fluid engine in either direction, and means to automatically return the reversing valve to neutral position.

In testimony whereof, I have hereunto set my hand.

FRANCIS A. J IMERSON. 

